19 Feb
2022
19 Feb
'22
3:22 a.m.
From: Rob Jarratt
I suspect some of the other cards that were in the
machine might do the
necessary termination stuff.
Different answers for each part of the functionality.
1A and 1C fundamentally have be at the end of the bus, physically. So,
unlikely; since _other_ cards aren't, generally, designed to go there.
1B could be anywhere, but I've basically never seen anything but a CPU or a
terminator with 1B functionality - probably in part because the same physical
components uually do both 1A and 1B. (Oddball exception: M981 UNIBUS jumper,
in the -11/40 - but that's 'sort of' part of the CPU.)
2, yes. E.g. the KT24 UNIBUS map has sockets to hold bootstrap PROMs.
(Compatible with the M9312's.) Others, too; e.g. the KTJ11-B UNIBUS adapter
(although that is not seen in an -11/24). Maybe others, but I can't recall
off the top of my head.
Noel